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TIR Emissivity Spectra of Thermally Processed Sulfates, Carbonates and Phyllosilicates as Analog Materials for Asteroid Surfaces

Maturilli, Alessandro und Helbert, Jörn und D'Amore, Mario und Ferrari, Sabrina (2013) TIR Emissivity Spectra of Thermally Processed Sulfates, Carbonates and Phyllosilicates as Analog Materials for Asteroid Surfaces. AGU 2013, 2013-12-09 - 2013-12-13, San Francisco, Kalifornien, USA.

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Kurzfassung

At the Planetary Emissivity Laboratory (PEL) of the German Aerospace Center (DLR) in Berlin we are building a database of spectral measurements of several meteorites and other analogs for asteroid surfaces. Bi-directional reflectance of samples in the 1 to 100 µm spectral range, are measured by using an evacuated (10-4 bar) Bruker Vertex 80V FTIR spectrometer and a Bruker A513 reflection unit, allowing phase angles between 26° and 170°. Emissivity in the 1 to 100 µm spectral range is measured with the same instrument coupled with an external emissivity chamber, for sample temperatures ranging from low (50° C) to very high (above 800° C). We present here new measurements on sulfates, carbonates, and phyllosilicates in various grain size ranges. The setup was configured to simulate the thermal history of surface minerals on the asteroid 2008 EV5 during its revolution around the Sun. This asteroid is the scientific target of the ESA Marco Polo-R mission. The samples in vacuum (< 0.8 mbar) are measured at surface temperature around 70° C, then the same samples are heated to 220° C, and maintained at this temperature for one hour. Slowly the sample temperature is reduced back again to 70° C and a second measurement is taken. Emissivity spectra before and after thermal processing of the samples are complemented with reflectance measurements on samples fresh and after thermal processing. This comparison show us that for some minerals no spectral/structural changes appear, while others show signs of dehydration and among them some species show structural changes. We conclude that a proper spectral library of emissivity spectra for asteroid analogue materials must include thermally processed samples, reproducing the thermal evolution for the asteroid that is target of the actual investigation.

elib-URL des Eintrags:https://elib.dlr.de/87017/
Dokumentart:Konferenzbeitrag (Poster)
Titel:TIR Emissivity Spectra of Thermally Processed Sulfates, Carbonates and Phyllosilicates as Analog Materials for Asteroid Surfaces
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Maturilli, AlessandroAlessandro.Maturilli (at) dlr.dehttps://orcid.org/0000-0003-4613-9799NICHT SPEZIFIZIERT
Helbert, JörnJoern.Helbert (at) dlr.dehttps://orcid.org/0000-0001-5346-9505NICHT SPEZIFIZIERT
D'Amore, Mariomario.damore (at) dlr.dehttps://orcid.org/0000-0001-9325-6889NICHT SPEZIFIZIERT
Ferrari, Sabrinasabrina.ferrari (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:8 Dezember 2013
Referierte Publikation:Nein
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Asteroids, Marcopolo-R
Veranstaltungstitel:AGU 2013
Veranstaltungsort:San Francisco, Kalifornien, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:9 Dezember 2013
Veranstaltungsende:13 Dezember 2013
Veranstalter :AGU
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erforschung des Weltraums
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben BepiColombo (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Experimentelle Planetenphysik
Hinterlegt von: Maturilli, Dr. Alessandro
Hinterlegt am:06 Jan 2014 07:26
Letzte Änderung:24 Apr 2024 19:53

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